Knob.



No. 665,534. Patented'lan. 8, I90l.

J. W. LAWSON.

KNOB.

[Application filed my; 16, 1899.|

(No odel.)

UNITED STATES PATENT OFFICE.

JAMES W. LAWSON, OF ALLEGHENY, PENNSYLVANIA, ASSIGNOR TO D. J.BATCHELDER, OF LYONS, IOWA.

- kNoB.

SPECIFICATION forming part of Letters Patent No. 665,534, dated January' 8, 1901.

Application filed March 16, 1899.

T0 on whom it may concern.-

Be it known that 1, JAMES W. LAWSON, a citizen of the United States,residing in the city of Allegheny, county of Allegheny, and State ofPennsylvania, have invented a new and useful Knob, of which thefollowing is a specification.

This invention relates to knobs, the object of the invention being toprovide a knob from a single piece of sheet metal and avoid the expenseand labor of spinning and also the expense and labor of casting theknobs from metal, these two methods being the ones commonly in use atthe present time and both of which are objectionable on account of theirexpense, and it is with the object of producing a high-grade knob at asmall cost that I have devised the present knob and its method ofconstruction,which, broadly speaking, con sists in constructing a knobfrom a single piece of sheet metal by stamping or punching the same intothe desired shape.

With the objects before mentioned in view my invention consists incertain details of construction and novelties of combination, all ofwhich will be fully described hereinafter, and pointed out in the claim.

In the drawings forminga part of this specification, Figure 1 is aperspective view of a knob constructed in accordance with my invention.Fig. 2 is a view showing the blank from which the said kn ob isconstructed. Fig. 3 is a perspective view showing the first step inshaping the blank. Fig. 4 is a View showing the manner of completing theshaping of the knob and attaching the same to the shank.

Fig. 5 is a sectional view of the knob and shank constructed inaccordance with my invention. Fig. 6 is a side elevation of a shank, andFig. 7 is a sectional View on the line 7 7 of Fig. 6.

In carrying out my invention I employ a blank A,which is essentiallystar-shaped, consisting of a circular body A and the points or tongues Aand A there being in the present instance eight points or tongues A andfour points or tongues A and it will be noted that the points or tonguesA are pointed at their outer ends, While the points or tongues A areflattened or made straight at their outer ends, as most clearly shown atA but it will Serial No. 709,295. (No model.)

also be noticed that all of the said tongues are of substantially thesame length. These tongues are furthermore arranged upon radial lines,and instead of a sharp angle between two points I preferably make acurve A as most clearly shown in Fig. 2, for the purpose of making aneater joint when the blank is struck up into the form of a knob. Theshank B is made of cast metal and is constructed with a cap or flange Band a shoulder B adjacent to and directly beneath the cap or flange B,and between the cap B and shoulder 13 the shank is made square incrosssection, as most clearly shown in Figs. 6 and 7, the said squareportion B being somewhat less in diameter than the shank proper, whilethe cap or flange B and the collar B are both somewhat larger indiameter than the shank proper. This shank, it will of course beunderstood, is constructed with the usual square bore, the same as theshanks now in use. In order to shape the blank into the form of a knoband simultaneously attach the said knob rigidly to the shank, I firstpunch the said blank by means of suitable punching-dies into the formshown in Fig. 3. The shank is then seated in a cup-shaped shaping-die O,the bottom of said die being flush with the upper surface of theshoulder B The blank is then placed in the cup-shaped die pointsdownward and a shaping and pressing die forced thereon, which actionforces all of the points or arms into the proper shape, brings themtogether, making tight joints, and forces the ends into the spacebetween the cap or flange and the collar of the shank, and it will beobserved that the straight ends A of the points or tongues A contactwith the square portion B of the shank, thereby preventing any possiblerotation of the knob upon the shank, and it will be noticed that thespace between the collar and flange is just large enough to accommodatethe arms or points of the blank, thereby rendering a tight connectionbetween the knob and shank when complete, and in order to securelyfasten or secure the said joints I employ a small quantity of solder atthis point and by the aid of heat securely connect the knob upon theshank.

It will thus be seen that I construct a knob from a single piece ofsheet metal without the employment of a bead and also without thenecessity of spinning. It will also be understood that I do notlimitmyself to the exact details of construction or combination, but maychange or vary the detailed parts considerably Without departing fromthe broad principles of my invention.

Having thus described myinvention, what I claim as new, and desire tosecure by Letters Patent, is

The combination with the knob formed of a single piece of sheet metalstruck up from a star-shaped blank, one or more of the points or tonguesbeing straight at the ends, of the shank, having the flange and collar,the space between the flange and collar being adapted to receive thepoints or tongues of the blank when shaped, the portion of the shankintermediate the flange and collar having one 01- more flat facesadapted to contact with the straight end or ends of the blank,substantially as shown and for the purpose described.

In testimony whereof I aflix my signature in presence-of two Witnesses.

JAMES W. LAWSON.

WVitnesses:

CHAS. W. MoRRow, JOSIAH MoRoBERTs.

